1.A creepy guy who has a thing for "stews" also known as flight attendants,female variety. He is usually remarkable for his porn mustache and clothing chiefly made from petroleum-based material.
2.A loathsome creature most often found on aircraft headed for all-inclusive resorts.

Flight Attendant to colleague: "Watch out for the skeevy guy in 25C near the lav- What a jump seat sniffer!"